The major news was announced this morning with a tweet from the official Pokemon account, which told fans to stay tuned for more information about new species on December 12th. Note: the 12th will be the day when a more detailed announcement comes, not the day the actual new Pokemon are released.

Although Niantic has not yet revealed this, the most likely answer is that the second generation of Pokemon will finally be released, although it also could be that legendary Pokemon are on their way. Mewtwo, Mew, Moltres, Articuno, and Zapdos have still not appeared in the app, but they are present in the game’s code, indicating that Niantic plans to unveil them eventually.

However, the second generation of Pokemon launching seems a bit more likely based on the way Niantic phrased a recent Facebook post. The company told players to “keep an eye out on our social media channels on December 12th for details about the first addition of more Pokémon into Pokémon GO.” They say that this is the first addition of more Pokemon, but they already added a new Pokemon when they unveiled Ditto a few weeks ago. This makes it sound like they mean it’s the first addition of an entire generation of new Pokemon, not just the addition of certain individual Pokemon like Mew and Mewtwo.

Niantic has said since the beginning that they plan to bring other generations of Pokemon into the game, and right before the holiday season seems like the perfect time. Recently, Niantic has had success with events tied to specific holidays like Halloween and Thanksgiving, and so the second generation launch could be tied into the various winter holidays that are coming up. That would also be a perfect time for it considering the number of children who will be home from school.

Very soon, then, you’ll either be able to get your hands on Mewtwo, Mew, Moltres, Articuno, and Zapdos, or on the following second generation Pokemon:

Chikorita

Bayleef

Meganium

Cyndaquil

Quilava

Typhlosion

Totodile

Croconaw

Feraligatr

Sentret

Furret

Hoothoot

Noctowl

Ledyba

Ledian

Spinarak

Ariados

Crobat

Chinchou

Lanturn

Pichu

Cleffa

Igglybuff

Togepi

Togetic

Natu

Xatu

Mareep

Flaaffy

Ampharos

Bellossom

Marill

Azumarill

Sudowoodo

Politoed

Hoppip

Skiploom

Jumpluff

Aipom

Sunkern

Sunflora

Yanma

Wooper

Quagsire

Espeon

Umbreon

Murkrow

Slowking

Misdreavus

Unown

Wobbuffet

Girafarig

Pineco

Forretress

Dunsparce

Gligar

Steelix

Snubbull

Granbull

Qwilfish

Scizor

Shuckle

Heracross

Sneasel

Teddiursa

Ursaring

Slugma

Magcargo

Swinub

Piloswine

Corsola

Remoraid

Octillery

Delibird

Mantine

Skarmory

Houndour

Houndoom

Kingdra

Phanpy

Donphan

Porygon 2

Stantler

Smeargle

Tyrogue

Hitmontop

Smoochum

Elekid

Magby

Miltank

Blissey

Raikou

Entei

Suicune

Larvitar

Pupitar

Tyranitar

Lugia

Ho-Oh

Celebi

This comes after the rumor that Starbucks will be launching a special promotional event to take place on December 8th. It was speculated that this could involve the release of new Pokemon, but now we know that this isn’t the case, with word of the new creatures not coming until December 12th.

However, with Sprint also recently announcing a partnership with Niantic and with the Starbucks event still being a possibility, it seems that companies may have decided to partner with the mobile app in December knowing that a major update was coming that would boost its popularity. After all, the apparently leaked memos from Starbucks indicated that Pokemon Go “version two” was on its way, with another saying that new Pokemon were being added to the game.